added common smarthome mqtt classes

smarthome.py

@@ -0,0 +1,59 @@
+import logging
+
+
+try:
+    from config import APP_NAME as ROOT_LOGGER_NAME
+except ImportError:
+    ROOT_LOGGER_NAME = 'root'
+
+
+class common_base(dict):
+    DEFAULT_VALUES = {}
+    DEVICENAME = "DEFAULT"
+
+    def __init__(self, default_values=None):
+        super().__init__(default_values or self.DEFAULT_VALUES)
+        #
+        self.__callback_list__ = []
+        self.ch_names = {}
+        self.logger = logging.getLogger(ROOT_LOGGER_NAME).getChild("devices")
+
+    def set_ch_name(self, key, name):
+        self.ch_names[key] = name
+
+    def get_name(self, key, default=None):
+        return self.DEVICENAME + "." + self.ch_names.get(key, key) + " (" + ".".join(self.topic.split('/')[1:]) + ")"
+
+    def add_callback(self, key, data, callback, on_change_only=False, init_now=False):
+        """
+        key: key or None for all keys
+        data: data or None for all data
+        """
+        cb_tup = (key, data, callback, on_change_only)
+        if cb_tup not in self.__callback_list__:
+            self.__callback_list__.append(cb_tup)
+        if init_now and self.get(key) is not None:
+            callback(self, key, self[key])
+
+    def set(self, key, data, block_callback=[]):
+        if key in self.keys():
+            value_changed = self[key] != data
+            self[key] = data
+            for cb_key, cb_data, callback, on_change_only in self.__callback_list__:
+                if cb_key is None or key == cb_key:                 # key fits to callback definition
+                    if cb_data is None or cb_data == self[key]:     # data fits to callback definition
+                        if value_changed or not on_change_only:     # change status fits to callback definition
+                            if not callback in block_callback:      # block given callbacks
+                                callback(self, key, self[key])
+        else:
+            self.logger.warning("Unexpected key %s", key)
+
+
+class mqtt_base(common_base):
+    def __init__(self, mqtt_client, topic, default_values=None):
+        super().__init__(default_values)
+        #
+        self.mqtt_client = mqtt_client
+        self.topic = topic
+        for entry in self.topic.split('/'):
+            self.logger = self.logger.getChild(entry)